Proto commits in erikmuttersbach/libhdfs3

These 4 commits are when the Protocol Buffers files have changed:

Commit:38a7368
Author:Zhanwei Wang

refactor read short circuit

The documentation is generated from this commit.

Commit:2a05c02
Author:Zhanwei Wang

implement truncate function for HDFS version 2.7

Commit:94e8b96
Author:Zhanwei Wang

initialize the repository

Commit:a811751
Author:Zhanwei Wang

initialize the repository